New YorkAlfred I. du Pont Private Course aka White Eagle Estate (Roslyn) - Unknown
Ammelita Galli-Curci Private Course (Highmount) - Unknown
Brander Estate aka Westmoreland (Shelter Island) - Unknown
C. M. Pratt Private Course (Glen Cove) - Bendelow
-The Sun April 13, 1896
Charles Francis Murphy Estate Course (Good Ground/Southampton) - Unknown
Daniel Guggenheim Private GC (Port Washington) - Unknown
Daniels Private Course (Long Lake) - Unknown
-Golfers Magazine Sept. 1916
De Zerega Private Course (Westchester) - Unknown
Donald Woodward Private Course (LeRoy) - Winton (may have become LeRoy GC)
-Daily News April 10, 1926
Durkee Estate aka Namkhe (East Patchogue) - Unknown
Edward S. Moore Estate GC (Roslyn) - Raynor
E. N. Howell Private Course aka Poughkeepsie GC (Poughkeepsie) - Unknown
-The Golfing Annual 1896-97
Erman Jesse Ridgeway (Elizabethtown) - Unknown
F. F. Proctor Estate (Central Valley) - Strong
Frank Lowden Private Course lka Wellesley Island Club (Thousand Islands) - Unknown (worked on by W. Watson)
Grant Hugh Browne Private Course (Goshen) - W. Park (possibly never built)
-Middletown Daily Times-Press May 11, 1916
H. P. Whitney Estate GC aka Greentree Course (Manhasset) - Macdonald & Raynor
Haight Private Course (??) - Unknown
-Golf Magazine April 1916
Harrison Williams Private Course (Bayville) - Emmet & Tull
Helen Gould Private Estate (Irvington-On-Hudson) - Unknown
-Official Golf Guide 1902
Howard Gould Private Course (Sands Point) - Unknown
-Official Golf Guide 1902
Isaac Guggenheim Private GC aka Trillora GC aka Villa Carola GC lka IBM GC nka Village Club of Sands Point (Port Washington) - Unknown
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http://www.golfclubatlas.com/forum/index.php/topic,29041.0.htmlJames B. Taylor Estate Course (Jericho) - Unknown
J. Finley Shepard Private Course aka Shepherd Hills GC (Roxbury) - Unknown
J. P. Knapp Estate (Southampton) - Raynor
J. P. Morgan Estate Course aka Matinecock Point (Glen Cove) - Unknown
John Jacob Astor Private Course (Rhinebeck) - W. Park
-The Sun May 23, 1895
-Los Angeles Herald July 4, 1895
-Los Angeles Herald Aug. 12, 1895
-Official Golf Guide 1902
Kelley Estate Private Course (Glen Cove) - Unknown
Liggett Estate Private Course (Sands Point) - Unknown
Luckenbach Private Course (Sands Point) - Unknown
-Brooklyn Daily Eagle Dec. 22, 1918
Mackay Private Course (Roslyn) - Unknown
-Golfers Magazine March 1916
Otto Kahn Estate Course aka Oheka GC aka Cold Spring Harbor CC (Cold Spring Harbor) - Macdonald & Raynor
Paramount CC fka Mountain View Farms and Dellwood CC aka Adolph Zukor Estate Course (New City) - Tillinghast
Pocantico Hills GC fka John D. Rockefeller Private Course (Tarrytown) - W. Dunn/Flynn
-Harper's Report of 1900
Schiff Private Course (Oyster Bay) - Unknown
Sherrewogue Estate GC (St. James) - Emmet
Stephen C. Clark Private Course (Cooperstown) - Emmet
Stern Private Course (Westchester) - Bendelow
Stittson Private Course (Sterlington) - Bendelow
-Official Golf Guide 1902
Thomas Simpson Private Course aka Overlook GC lka Sunningdale CC (Scarsdale) - Unknown (remodeled by Raynor, Travis and Tillinghast)
Vanderbilt Estate GC aka Strathmore-Vanderbilt CC (Manhasset) - Emmet & Tull
Whitelaw Reed Private Course (Purchase) - Unknown
William C. Whitney Estate Course (Wheatley Hills) - Unknown